You might as well compare with these Back Items so you can decide which Back Items you're gonna use for ninja Saga Pvp or in Hunting House for easier killing the boss or your opponent in ninja saga PvP
These Back Items might have better effect . Here we go :

• Bronze Torch of Zeus

  Increase mission XP reward by 200
• Venom Ghost

  Has 5% chance to convert damage taken to HP positively. Recover HP by 100 every turn.
• S65 Transcendent Flame Wings

  Remnants of a powerful fire spirit. Increases attack damage by 7% and increase 20% Combustion chance. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• S76 Buckler and Sword

  Increase max.HP by 12% but reduce max. CP by 2%.
• Crystal Ice Mirror

  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%
• New Year Kadomatsu

  Recover 100 HP and 100 CP at the start of every turn.
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• Master Scroll

  Restores HP & CP by 3%.
• Successor Fan

  Restores HP & CP by 2%. Has 7% chance to freeze enemy who attacks user (2 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Grand Light Gourd

  Increase 3% damage
• Brilliant Stock Pot

  Increase max. HP by 8% and purify chance by 2% but reduce max. CP by 8%.
• Knot of Avenger

  20% chance to absorb 2% HP of enemy who attack you. 20% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Sakura Dance

  Increase damage by 3% and max. HP by 4%.
• Flame Blade Raijinco
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• Red Shell
• Large Wooden Hammer
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• Mini Scroll
• Hanami Fan

  Ignore 4% targets dodge and increase max. HP by 2%.
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• S60 Amber Jewel Wings

  Increases attack damage by 10% and increase 5% Combustion chance.
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Pirate Skull Flag

  Increase 6% purify chance. Reduce damage taken by 5%.
• Call of the Angel

  Reduce damage taken by 100. Has 6% chance to convert damage taken to HP positively.